Examples of your vision & skills
Are you an employee who simply does what he is told or do you have vision and see the bigger picture? Relate stories in which you added value to the company, your department or your team.
If you're older and concerned you might be seen as too old for a position, show your willingness to learn new things, your facility with tech, etc.
If you're younger and feel you might not be experienced enough, relate stories of your maturity, times you've stepped up and led, etc.